All,

Here is my graph for my Evo IX:



The mod list is on my signature.

Please comment not in the numbers but in the shape of the curves and behavior!

AFRs were between 11.5-10.9 under boost. Timing at WOT was 5-8 degrees (advance) under peak boost and 9-17 after boost taper (5000-7300 RPMS).

 

what are your knock counts like?

 

0 knocks! I had to adjust (reduce) timing under high load cells (280-290sh) and decrease AFR to eliminate knocks during spool up (3000-4000 RPMs). This was robbing me around 10-13 HP and my Torque was down dramatically.... in some areas up to 20 lb of torque.

Before, I used to get between 3-5 knocks.

All my friends are really impressed how hard my car pulls from 2nd and 3rd with a stock turbo. But, I loose power (boost taper) after 5500 RPMs. I got me a fpgreen with the hp actuator. We will see how the turbo handle the boost taper!

Just wanted people to comment in comparison with same amount of mods on some other IXs.

 

what's BR Stages 1&2?

 

Tephra, go to www.buschurracing.com for the stage information.

Joedr, the curve looks good, noticed a little dip in both HP and torque between 5000-5500 rpm.

 

Numbers and curve looks GREAT....Are you running without a catalytic converter? Is the dyno data corrected or uncorrected? My car has a UR cat. on it and seems to be dead after 6K, but still you have ~30+ more hp / ft lbs than me ... Also, you TQ curve looks nice and flat compared to what I am seeing at 24.5 and 26 psi (peak) and I wonder if more power can be had with less boost (22.5 psi peak) and more timing. I asked this very question just a few days ago and got all sorts of mixed feedback, most of which felt more boost was beneficial than timing, yet your curve seems to negate that...Congrats!

 

please post the log, the boost pressure, and the octane used.

 

cij911,

No cat. Just test pipe! Dyno data corrected... that is why I mention not to look at the numbers tho. I am not sure if I did it right or wrong. I placed all the atmospheric parameters based on current ones at that time. Also, added my weight with the laptop.

I am running around 24-25 peak with no knocks at all and I had never got a CEL for that matter.

I was going to put around 15 different pulls I did (not back to back) while tuning for better MIVEC tables and less boost with more timing. Seem to be that the infamous JDM RS one was so darn close for a balance between fast spool up with very nice midrange. Also, reducing boost and advancing timing was not giving me more power nor torque. But the curves at top end were higher than the ones on the picture. I do not drive at 6000-7000 RPMs all day and my butt dyno with less boost was not feeling as agressive as higher boost and tuned timing.

I think that most of the tq/hp loss at top end is due to boost taper. I got a new turbo with an 18 PSI spring and will see how they compare. I think that maintaining a peak of around 24 PSI tapered to 20 PSI at redline will give me the best of all. My car is around 16 PSI right at redline. I just ordered a JDM map to be able to log boost an provide true numbers.

My friend has an MR as well with similar mods... TBE, MBC, e-flash self tune, fule pump and intake. He is running less boost and more timing. His numbers were higher all the way from 5000 RPMs compared to mine. He has a higher HP peak number but I have way more tq at low and mid range. My peak tq is around 15 lbs higher than his. His car runs 21-22 peak.

I am still pulling him from 2nd and 3rd all day.... all the way up to redline for about 3/4 of a car at the end. Same thing from a 0 MPH launc at 5000 RPMs... My car was still 3/4 of a car ahead of him. We switched drivers.... same thing. We let my brother and cousin drive our cars.... same thing. My conclusion was that the peak higher boost was producing more usable power. The drastic pull that gave me the lead was stronger than his peak power causing him not to be able to catch me.

The area under the curve is more noticeable across the board on my numbers. Meaning that his car is only above my curve from 5000 for only 5-7 WHP/TQ. In contrast with mine that I am 12-21 WHP/TQ on low and mid range in comparison to his. By the way, both cars seem to taper boost the same way... my end number seems to be smaller than his for about 2-3 pounds. If I could improve my boost taper to his 17-19 PSI at top end... I bet that my numbers at top end would be higher than his acroos the board.

Just thowing my experience and my 0.02! I still believe that higher boost is more beneficial for the IX.

Disclaimer: By no means I am claiming this is an identical comparison.... one to one in term of the numbers. But it shows in reality (by doing pulls) that the innitial pull at launch or from 2nd/3rd caused by a higher peak w/o knocks is giving me advantage over my friend's car. At least on our side!

 

No logs at this time! I am out of town and did not bring my laptop.

Boost: 24-25 peak... taper to ~16 PSI at redline.
Octane: 93 Octane

Please do not bash for the numbers. I just want to compare how your curves shape compare to mine with similar mods.

 

Ok so you are running 24psi peak (your signature said 22.5)....I am hitting 24.5 psi peak now and tapering to 19.5 psi at 7K (ignore my signature), but still am no where close to your numbers. Maybe my cat. is costing me 15 hp & ftlbs, but your midrange looks better than mine as well. I need to re-tune the car for 24.5 peak psi and see if I can improve the torque curve and top end HP.

Great job...

 

oops! I will update signature. Thanks for the input!

 

Looks good, are you using correction? Also do you have a LICP or just the upper?

 

Curve looks very nice to me

 

I used correction! I have only the upper pipe.

I purchased a new I/C (24*12*3 inches core) and the LICP. I will install it along with an FPgreen and upgraded injectors.

 

Thanks everybody for the comments!

I saved the logs and will do a comparison before and after the fpgreen install.

The intent is to use this one as a baseline to compare with the fpgreen.